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cmd/geth, jsre: improve the js command

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geth js stopped the JS runtime after running the first input file
and blocked for pending callbacks. This commit makes it process
all files and enables quitting with Ctrl-C regardless of callbacks.

Error reporting is also improved. If a script fails to load, the error
is printed and includes the backtrace. package jsre now ensures that
otto is aware of the filename, the backtrace will contain them.

Before:

$ geth js bad.js; echo "exit $?"
... log messages ...
exit 0

After:

$ geth js bad.js; echo "exit $?"
... log messages ...
Fatal: JavaScript Error: Invalid number of input parameters
    at web3.js:3109:20
    at web3.js:4917:15
    at web3.js:4960:5
    at web3.js:4984:23
    at checkWork (bad.js:11:9)
    at bad.js:19:1

exit 1
This commit is contained in:
Felix Lange
2016-04-20 23:17:00 +02:00
parent a6ca8fd268
commit 87ae0df476
3 changed files with 34 additions and 13 deletions
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16
cmd/geth/js.go
View File

@ -123,7 +123,7 @@ func (self *jsre) batch(statement string) {
err := self.re.EvalAndPrettyPrint(statement)
if err != nil {
fmt.Printf("error: %v", err)
fmt.Printf("%v", jsErrorString(err))
}
if self.atexit != nil {
@ -301,21 +301,19 @@ func (self *jsre) preloadJSFiles(ctx *cli.Context) error {
for _, file := range jsFiles {
filename := common.AbsolutePath(assetPath, strings.TrimSpace(file))
if err := self.re.Exec(filename); err != nil {
return fmt.Errorf("%s: %v", file, err)
return fmt.Errorf("%s: %v", file, jsErrorString(err))
}
}
}
return nil
}
// exec executes the JS file with the given filename and stops the JSRE
func (self *jsre) exec(filename string) error {
if err := self.re.Exec(filename); err != nil {
self.re.Stop(false)
return fmt.Errorf("Javascript Error: %v", err)
// jsErrorString adds a backtrace to errors generated by otto.
func jsErrorString(err error) string {
if ottoErr, ok := err.(*otto.Error); ok {
return ottoErr.String()
}
self.re.Stop(true)
return nil
return err.Error()
}
func (self *jsre) interactive() {